Alrighty, no problem.
If you've done all those steps, it should work, assuming DT is actually working in W10. If you're able to mount the image but it's just not loading in SSF, double-check to make sure SSF is looking at the correct virtual drive. I believe it's in the "Peripherals" section in SSF's options. There's a section for "CD Drive" - just make sure it's looking at the one that corresponds to your DT virtual drive.